Liquid dispensing apparatus



6 Sheets-Sheet 1 July 26, 1938o l. R. FARNHAM ET AL.

LIQUID DISPENSING AAPPARATUS Filed April l5, 1953 l A jb July 26, 1938I. R.'FARNHAM ETAL LIQUID DISPENSING APPARATUS Filed April 15, 1933llllllllllljmll'lllll llllllwlllill? munlnm 6 Sheets-Sheet 2 July 2s,193s.

l. R.V FARNHAM ET AL LIQJID nIsPENsING APPARATUS Filed Apri1`l5, 1933 6Sheets-Sheet 3 July 26, i938. l. R. FARNHAM Er AL 2,324,614 LIQUIDDISPENSING APPARATUS .FiledApril v15, 1933 6 Sheets-Shet 4 July 26,1938.un. FARNHAM E-r AL f 2,124,614 LI'QUID msPENsING APPARATUS Filed April15, 1933 6 Sheets-Sheet 5 July 26, 13938.- v l. R. FARNHAM ET AL 12,124,514

l LIQUID DISPENSING APPARATUS Filed April 15, 193s sheets-sheet efZz/erf. @an R. Farm/zam, 27rd Wmfm,

Patented July 26, 1938 LIQUID DISPEN SING APPARATUS Ivan R. Farnham,Fred W. Sturm, and Friedrich W. Mueller, Fort Wayne, Ind., assignors, bymesne assignments, to The Wayne Pump Comlpanf, Fort Wayne, Ind., acorporation of Mary- Application April 15, 193s, semi No. 666,312 17claims; (ci. zzn-95) This invention pertains to a liquid dispensing theinvention, the same being taken substantially apparatus, and moreparticularly to an interin the plane as indicated by the line 2-2 'oflocking mechanism for preventing further oper- Figure 3; ation of theliquid dispensing apparatus after Figure 3 is a side elevation of theinterlocking dispensing operation and until the counter theremechanism,the same being taken in the posiof has been set back to zero., tion asshown in Figure 1, showing the mecha- The invention comprehends the ideaoi pronism in a position where the registering mecha.- viding novelcontrol means for controlling the nism is set to zero and with theswitch operating operation of a power means for delivering fluid armlowered whereby the switch is in oil posi-y from dispensing apparatus.More particularly, tion; l the invention includes the providing of novelFigure 4 is a sectional .elevation corresponding means associated withthe indicating means proto Figure 2 showing the switch and operatingvided in the apparatus which is adapted to ren arm in on position, thesame being taken subder the power means initially inoperativeexstantially in the plane as indicated by the line cept when theindicating means is in a predeter- 4-4 of Figure 5; mined position.Figure 5 is a side elevation corresponding to Another object of thepresent invention is to Figure 3 showing the switch operating arm inprovide a novel control means for controlling the raised positionwhereby the switch is operative: initial operation of a manuallyoperated switch Figure 6 is a side elevationcorresponding to or othersimilar means for closing the circuit Figure 3 showing the switchv'operating arm in of an electric motor adapted to dispense uid loweredposition aiter it has been in the posifrom a iiuid dispensing apparatus,such control tion illustrated in Figure 5; means being associated withan indicating means Figure 7 is a sectional elevationA corresponding ofthe apparatus in such a manner as to render to Figure 2, the same beingtaken substantially this switch initially operative only when the ininthe plane as indicated by the line 1-1 of dicating means is in apredetermined position, Figure 6; such as a zero reading. This novelcontrol Figure 8 is a side elevation of a modiiied form means,therefore, has the distinct advantage of of interlocking mechanismshowing the same in providing a means whereby operation of the the rstposition wherein the registering mechaiiuid dispensing apparatus can beeffected only nism is in the zero position and before the switch afterthe attendant has moved the indicating operating arm has been raised toclose the means back to its initial or zero reading, thereby switch; Kpositively indicating to the individual receiving Figure 9 is asectional side elevation taken the fluid that the position of theindicating substantially in the plane as indicated by the means at anytime corresponds with the numline 9-9 oi Figure 8; ber of units of fluidactually dispensed from the Figure 10 is a fragmentary sectionalelevaapparatus. tion taken substantially in the plane as indi- Stillanother object is to provideA a liquid discated by the line |0--i0 ofFigure 9; pensing apparatus having reset means for the in- Figure 11 isa sectional side elevation corredicating mechanism in association withcontrol sponding to Figure 8 showing the switch operatmeans whereby thepower means is operative ing arm in raised position to close the switch;only after the registering means is reset to zero. Figure 12 is asectional elevation taken sub- With these and various other objects inview, stantially in the plane as indicated by the line the invention mayconsist of certain novel feai2--I2 of Figure ll; tures of constructionand operation as will be Figure 13 is a sectional elevation takensubmore fully described and particularly pointed stantially inthe planeas indicated by the line out in the specication, drawings and claims|3-i3 of Figure 12; appended hereto. Figure 14 is aside elevationcorresponding to In the drawings, which illustrate embodiments Figure 8showing the switch operating arm in of the device and wherein likereference characlowered position after registering has taken ters areused to designate like partsplace at the meter wherein the. switch andthe Figure 1 is a sectional elevation of a liquid liquid dispensingapparatus areinoperative; dispensing apparatus embodying the invention;Figure 15 is a sectional elevation taken sub- Figure 2 is an enlargedsectional elevation of stantially in the plan' "s indicated by the lineone form of interlocking mechanism embodying -i5i5 of Figure Il .E

Figure 16 is a sectional elevation taken substantially in the plane asindicated by the line lidi6 of Figure 15.

Referring first of all more particularly to Figure 1, the liquiddispensing apparatus consists essentially of the base 30 adapted tosupport the casing 32, the framing 34 secured to the base and within thecasing being provided with the platforms 86 and 38, the platform 36being adapted to support a pump 40 and the motor 42 which is operativelyconnected to said pump. The suction side of the pump is connectedthrough the pipe 04 to the source of liquid supply 46, and uponoperation is adapted to draw the liquid from the source of supply 46 andsupply it to the inlet side of the meter 48 through the pipe 50. Anexpansion chamber 52 may be provided associated with the pump for takingcare of any expansion in the liquid dispensing apparatus. The outletside of the meter 48 is connected through the pipe 54 to the sight gauge56 to which the hose 58 is connected, the end of the hose being providedwith the nozzle valve 60 having the operating handle 62 and the guard 04associated therewith.

The meter 48 is provided with the rotating shaft 66 controlled bysuitable pistons provided in the meter, the shaft being connected toregistering and computing mechanism 68 as illustrated in Patent No.1,888,533. The registering mechanism is adapted to be reset by means ofthe shaft 'l0 controlled by the crank'l'2. The operation of the motor 42is controlled by a suitable electric switch '|4 interposed in thecurrent conduit 16, the switch being controlled by the link 18 connectedto the switch operating arm 80, said arm being pivoted as at 82 to theinterlocking mechanism housing 84. The switch operating arm 80. isassociated with the nozzle support 86 secured to the housing 84, thehousing 84 being adapted to be secured to the framing 34 in the casing32. v

Referring now more particularly to the form of interlocking mechanismillustrated in Figures 2 to 7 inclusive, the switch operating arm 80 isloosely connected to the lever, 88 pivoted to the housing bracket 90 asat 92, the opposite end of the lever 88 being loosely connected to theinterlocking rod 84 through the block 96. The rod 94 is mounted forreciprocating movement in the track 98 provided in the housing 84, andthe opposite end of therod y.is adapted, inthe zero position of theregistering mechanism 68,

to be received in a suitable aperture or cutout` portion |00 provided in.themember |02 of the' the outer end of said shaft being provided -with'the reset crank 12.

The reset shaft is provided with the cam I8 adapted to engage theplunger |20 mounted for reciprocation in the housing 84 and urgedupwardly toward the cam 'by means of the springv |22, the plunger beingloosely connected to the leg |24 of the bell crank |26, said bell crankbeing pivotally mounted as at |28 to the housing 84, the depending leg|30 of the bell crank being loosely connected to the latch |32 slidablymounted in the channel or track |34. The inner end of the latch $32 isurged downwardly by means of the spring |36 provided in the housing 84the inner end of the latch being notched as Y at i 38 to provide a latchmember |00, the notched portion being adapted to embrace the upwardlyextending latch arm |42 provided on the switch arm 80. The latch arm |02is provided with oppositely facing latch ledges |04 and |46 adapted tohave latching cooperation with the latch member |00 of the latch |32.

In operation of this form of the'device, assuming the registeringmechanism to be in zero position and the switch 14 to be in 0E positionas shown in Figures 2 and 3, when it is desired to operate the liquiddispensing apparatus, the switch arm is raised to the position asindicated in Figure 5 to close the switch 74. Movement of the switch arm80 in a counterclockwise direction to raise said switch arm causesrotation of the lever 88 in a counter-clockwise direction as viewed inFigure 4 whereby the interlocking rod 84 is raised to cause the end ofsaid rod to enter the aperture |00 of the member |02, thus preventingany tampering with the registering mechanism 68. The cam ||8 will be outof engagement with the plunger |20 wl? ereby the latch |32 will havebeen moved toward the right as viewed in Figure 4, the latch portion |40riding up on the bevel of the latch ledge |44 whereby the arm 80 can bemoved to full upward position to close the switch 14.

After dispensing the requisite amount as indicated by the registeringmechanism 68, when it is desired to shut oi the flow of liquid, theswitch arm is depressed to the position as illustrated in Figures 6 and7. Depressing the switch arm causes the lever 88 to move in a clockwisedirection to lower the interlocking rod 94 out of engagement in theaperture |00. Lowering the rod 94 causes the latch member |40 to rideoif the ledge |44 and engage behind said ledge |44 whereby the switcharm cannot be re-raised without resetting the registering mechanism 68.This is done by rotating the crank 12. Rotation of said crank causesrotation of the reset shaft |04.

Rotation of said shaft causes the cam ||8 to depress the plunger |20 tocause the bell crank |26 to be rotated in a clockwise direction to movethe latch member |32 toward the left as viewed in Figure 2. 'I'his willcause the latch member to ride up on the bevel of the latch ledge |46and remain there by virtue of engagement with has been reset to zero-andthe operator has re nl, moved the discharge hose 58 from, theswitcl'iffv arm 80lfor serving a customer, but the regis- 'teringmechanism will not 'reach its zero position until the aperture |00 isalignedv with the interlocking rod 94. Therefore the switch arm80cannotbe raised to operatethe switch until the aperture isin `thatposition, at which time.

the operation just described takes place, raising of the arm 80 causingthe latch member |40to' again ride up'the bevel of latch |44.

Referring now more particularly to the form of interlocking mechanismshown in Figures 8 to 16, inclusive, the interlocking mechanism housing|50 is adapted to be secured to the framing of the liquid dispensingapparatus in the casing as already described with respect to the housing84, the nozzle support 86 being secured to the bracket |52 of saidhousing. The switch operating arm |54 is pivoted as at |56 Within thevhousing 50 and has an inwardly extending arm |58 loosely connected tothe link 18 for operation of the switch'l.

The switch operating arm is provided with the cam |60, said cam beingprovided with the locking shoulder |62 extending substantially parallel-to the axis of the shaft |64 forming the pivot |16, the other leg |18of said lever being urged upwardly by means of the spring |80, fastenedto the casing, said leg being adapted to have operative engagement withthe plunger |82, said plunger slidably extending upwardly through thecasing.

'I'he shaft |64 is provided with the crank |84 loosely connected at |86to the interlocking rod |88 slidably mounted in the housing. The resetshaft |80 for the registering mechanism is suitably journalled as at |82in the housing and provided with the reset knob |84, said shaft beingprovided with the cam |86 disposed in alignment with the plunger |82,and the shaft is also provided with the member |88 aligned with theinterlocking rod |88 and provided with the apertured or cut out portion200 for the reception of one end of the interlocking rod |88.

In operation oi' this device, assuming that the registering mechanism isin the zero position and the parts in the positions as illustrated inFigures 8, 9 and l0, with the switch arm lowered, when it is desired tostart the motor the switch arm is raised, causing the link 18 to closethe switch 14. Raising the switch arm |54 to the position as illustratedin Figure 11 causes the locking shoulder |62 to move in acounter-clockwise direction as viewed in Figures 10 and 13 to move thelocking portion |10 out of engagement with the leg |12 of the lever |14,causing the lever |14 to drop down onto the cam |60.

After the liquid has been dispensed and it is desired to render theliquid dispensing apparatus inoperative, the switch arm |54 is loweredto the position as illustrated in Figures 14, 15 and 16.

Lowering the switch arm causes the leg |12 of thelocking lever |14 todrop off the cam |60, it being noted that the cam is of less height thanthe locking portion |10 so that the long leg |12 of the lever willengage between the cam and the locking portion |10 as shown in Figure16. It will therefore be impossible to raise the switch arm |54 as theshaft |64` is locked so long as the registering mechanism has notbeenmoved to the zero position.

Assuming that the discharge hose is hung up. on the switch-arm |54, theturning of the reset knob |84 to reset the registering mechanism back tozero position causes cam |86 to push down on plunger |82, which contactsthe leg |18 of the locking lever |14 and pushes it down far enough toforce the other leg |12 of the locking lever up high enough to permitspring 202, which is interposed between the housing and the leg 204provided on said locking portion, to move the locking portion |10 to aposition below the leg |12, but the switch arm |54 cannot be moved toclose the switch 14 until full zero position, when the cut out portion200 of the member |88 will be in alignment with the interlocking rod|88, at which time upward movement of the switch arm causes theinterlocking rod to enter -the cut out portion to permit depressing thelink 18 to close the switch to operate the dispensing apparatus.

It will thus be appreciated that with the interlocking mechanismsillustrated simple means is provided for preventing further operation ofa liquid dispensing apparatus until such time as the registeringmechanism has been set to zero position, and in the event that theswitch arm has been raised and the motor started whether or not anyliquid is dispensed and the switch is again pulled down to inoperativeposition, it is necessary to again reset the registering mechanism backto the predetermined or zero position before the switch arm may again beraised, and it is to be understood that we. do not wish to be Hunted bythe exact embodiments of the device shown, which are merely by way ofillustration and not limitation, as various and other forms of thedevice will of course be apparent to those skilled in the art withoutdeparting from the spirit of the invention or the scope of the claims.

We claim:

1. In interlocking mechanism, the combination of a switch arm havingoppositely arranged latching shoulders, a latch member having a portionadapted to have cooperative engagement with said latching shoulders toprevent operation of said switch arm, a shaft, .and connecting meansbetween said shaft and latch member for rendering s aid latch memberinoperative to permit operation of the switch arm when said shaft is ina predetermined position.

2. In interlocking mechanism, the combination of a switch arm havingoppositely arranged latching shoulders, a latch member having a portionadapted to have cooperative engagement with said latching shoulders toprevent operation of said switch arm, a shaft, connecting means betweensaid shaft and latch member for rendering said latch member inoperative`to permit operation of the switch arm when said shaft is in apredetermined position, and means interposed between /said latch andshaft for rendering said shaft inoperative when said switch arm is inoperative position.

3. In interlocking mechanism, the combination of a switch arm havingoppositely arranged latching shoulders, a latch member having a portionadapted to have cooperative engagement with said latching shoulders toprevent operation of said switch arm, a shaft, connecting means betweensaid shaft and latch member for rendering said latch member inoperativeto permit operation of the switch arm when 'said shaft is in apredetermined position, and means interposed between said switch arm andshaft-for rendering said shaft inoperative in a predetermined positionthereof.

4. In an interlocking mechanism, the combination of a switch arm, areset shaft, interlocking means between said switch arm and reset shaftwhereby when said switch arm is in operative position said reset shaftwill be inoperative, latching means interposed between said shaft andswitch arm adapted to be operative to render said switch arm inoperativeafter pre-determined operation of said switch arm, and means interposedbetween said latching means and reset shaft for moving said latchingmeans to inoperative position to pei-mit operation of said switch armafter pre-determined operation of said reset shaft.

5. In an interlocking mechanism, the combination of-a switch arm, areset shaft, interlocking means between said switch arm and reset shaftwhereby when said switch arm is in operative gli,

position said reset shaft will be inoperative, latching means interposedbetween said shaft and switch arm adapted to be operative to render saidswitch arm inoperative after pre-determined operation of said switcharm, means interposed between said latching means and reset shaft formoving said latching means to inoperative position to permit operationof said switch arm after pre-determined operation of said reset shaft,said means including a cam mounted on said reset shaft, a plungeradapted to be moved by said cam, and a bell crank interposed betweensaid plunger and latching means.

6. In reset mechanism, the combination of a switch arm pivotally mountedon a shaft, a reset shaft, interlocking means interposed between saidreset shaft and switch for rendering said reset shaft inoperative whensaid switch arm ls moved to a pre-determined position, a locking memberpivotally mounted on said shaft, means operative by said switch arm formoving said locking member, and a lever adapted to cooperate with saidlocking member whereby said switch arm is rendered inoperative.

'7. In reset mechanism, the combination of a switch arm pivotallymounted on a shaft, a reset shaft, interlocking means interposed betweensaid reset shaft and switch for rendering said reset shaft inoperativewhen said switch arm is moved to a predetermined position, a lockingmember pivotally mounted on said shaft, means operative by said switcharm for moving said locking member, a lever adapted to cooperate withsaid locking member whereby said switch arm is rendered inoperative, andmeans cooperating with said lever and reset shaft for moving said leverto inoperative position for permitting operation of said switch arm.

8. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switch arm, said cam havinga locking shoulder, a locking member pivotally mounted on said shaft andadapted to engage said locking shoulder, a lever pivotally mountedadjacent said shaft and having a portion adapted to cooperate with saidcam and shoulder whereby in a predetermined position said lever willprevent operation of said switch arm.

9. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switch arm, said cam havinga locking shoulder, a locking member pivotally mounted on said shaft andadapted to engage said locking shoulder, a lever pivotally mountedadjacent said shaft and having a portion adapted to cooperate with saidcam and shoulder whereby in a pre-determined position said lever willprevent operation of said switch arm, a reset shaft, and meansinterposed between said lever and reset shaft for rendering said leverinoperative.

10. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switch arm, said cam havinga locking shoulder thereon, a locking member pivotally mounted on saidshaft and adapted to engage said locking shoulder, said locking memberhaving a portion raised above said shaft, a lever pivotally mountedadjacent said shaft and having a portion adapted to cooperate with saidcam and shoulder and adapted to be moved to engage a portion of said camto prevent operation of said switch arm when said locking member is outof engagement with said locking shoulder.

li. In interlocking mechanism, the combinaaiaaeie tion of a shaft, aswitch arm mounted on said shaft, a cam mounted on said switch arm, saidcam having a locking shoulder thereon, a locking member pivotallymounted on said shaftand adapted to engage said locking shoulder, saidlocking member having a portion raised above said shaft, a leverpivotally mounted adjacent said shaft and having a portion adapted tocooperate with said cam and shoulder and adapted to be moved to engage aportion of said cam to prevent operation of said switch arm when saidlocking member is out of engagement with said locking shoulder, andmeans for moving said locking lever out of engagement with said cam topermit engagement between said locking member and shoulder whereby saidswitch arm may be moved to-operative position.

12. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switch arm, said cam havinga locking shoulder thereon, a' locking member pivotally mounted on saidshaft and adapted to engage said locking shoulder, said locking memberhaving a portion raised above said shaft, a lever pivotally mountedadjacent said shaft and having a portion adapted to cooperate with saidcam and shoulder and adapted to be moved to engage a portion of said camto prevent operation of said switch arm when said locking member is outof engagement with said locking shoulder, a reset shaft, and aninterlocking means between said shaft and said reset shaft forpreventing operation of the switch arm only when said reset shaft is ina pre-determined position.

13. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switcharm, said cam havinga locking shoulder thereon, a locking member pivotally mounted on saidshaft and adapted to engage said locking shoulder, said locking memberhaving a portion raised above said shaft, a lever pivotally mountedadjacent said shaft and having a portion adapted to cooperate with saidcam and shoulder and adapted to be moved to engage a portion of said camto prevent operation of said switch arm when said locking member is outof engagement with said locking shoulder, means for moving said lockinglever out of engagement with said cam to permit engagement between saidlocking member and shoulder whereby said switch arm may be moved tooperative position, a reset shaft, and interf locking means between saidshaft and said reset shaft for preventing operation of said switch armonly when said reset shaft is in a. predetermined position.

1d. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switch arm, said cam havinga locking shoulder, a locking member pivotally mounted on said shaft andadapted to engage said locking shoulder," a member mounted adjacent saidshaft and having@ portion adapted to cooperate with said cam andshoulder whereby in a pre-determined position said member will preventoperation of said switch arm.

l5. In interlocking mechanism, the combination of a shaft, a switch armmounted on said shaft, a cam mounted on said switch arm, said cam havinga locking shoulder, a locking member pivotally mounted on said shaft andadapted to engage said locking shoulder,l a member mounted adjacent saidshaft and having a portion adapted to cooperate with said cam andshoulder whereby in a pre-determined position said member will preventoperation of said switch arm, a reset shaft, and means interposedbetween said member and reset shaft for rendering said memberinoperative.

16. In an interlocking mechanism, the combination of a switch arm, areset shaft, interlocking means between said switch arm and reset shaftwhereby when said switch arm is in operative position said reset shaftwill be inoperative, slidable latching means interposed between saidreset shaft and switch arm adapted to be operative to render said switcharm inoperative after predetermined operation of said switch arm, andmeans interposed between said latching means and reset shaft for slidingsaid latching means to inoperative position to permit operation of saidswitch arm after the pre-determined operation of said reset shaft. I

17. In an interlocking mechanism, the combination of a switch arm, areset shaft, interlocking means between said switch arm and reset shaftwhereby when said switch arm is in operative position said reset shaftwill be inoperative, slidable latching means interposed between saidreset shaft and switch arm adapted to be operative to render said switcharm inoperative after pre-determined operation of said switch arm, meansinterposed between said latching means and reset shaft for sliding saidlatching means to inoperative position to permit operation of saidswitch arm after the pre-determined operation of said reset shaft, saidmeans including a cam mounted on said reset shaft, a plunger adapted tobe moved by said cam, and a bell crank interposed between said plungerand latching means. l

IVAN R.. FARNHAM.

FRED W. STURM.

FRIEDRICH W. MUELLER. 20

